How to create 3D graphics from scratch?

Question

I've been looking for a (free) tutorial on how to create 3D graphics, but all I found is using three.js mainly, can someone recommend some guide or tutorial to learn enough to at least create a 3D shape on screen?

Answer 1

https://code.sololearn.com/WaVusr8J1KvK/?ref=app

Answer 2

Much appreciated